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Epoxy resin composition for transformer and preparation method thereof

A technology of epoxy resin and novolac epoxy resin, which is applied in the field of epoxy resin composition for transformers and its preparation, can solve the problems of accelerating the aging of insulators and affecting the service life, and achieve high temperature aging resistance, not easy to be brittle, and low moisture absorption rate , Excellent heat dissipation effect

Inactive Publication Date: 2020-11-03
SHANGHAI XIONGRUN RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The installation and use of transformer coils in the south and north have different temperature differences between day and night, which will accelerate the aging of insulators and affect their life. Transformer cracking accidents caused by temperature differences between day and night and geographical temperature have occurred both at home and abroad.

Method used

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  • Epoxy resin composition for transformer and preparation method thereof
  • Epoxy resin composition for transformer and preparation method thereof
  • Epoxy resin composition for transformer and preparation method thereof

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preparation example Construction

[0067] The second aspect of the present invention provides a method for preparing the epoxy resin composition for transformers, at least including the following steps: mixing the components uniformly to obtain

[0068] In a preferred embodiment, the preparation method of the epoxy resin composition for transformers at least includes the following steps: mixing epoxy resin, curing agent, accelerator, inorganic filler, and toughening agent at 120-140°C After mixing for 1-3 hours, vacuum degassing, solidification and molding.

[0069] The third aspect of the present invention provides an application of the epoxy resin composition for transformers, which is applied to transformers.

Embodiment 1

[0073] Embodiment 1 of the present invention provides an epoxy resin composition for transformers. In parts by weight, the preparation raw materials include 80 parts of epoxy resin, 50 parts of curing agent, 0.05 parts of accelerator, 30 parts of inorganic filler, 3 parts of toughening agent.

[0074] Described epoxy resin comprises bisphenol A type epoxy resin, aliphatic epoxy resin and biphenyl type epoxy resin; Described bisphenol A type epoxy resin, aliphatic epoxy resin and biphenyl type epoxy resin The mass ratio is 1:0.5:0.6.

[0075] The bisphenol A epoxy tree was purchased from An Debao of Shanghai Huayi Resin Co., Ltd. 328; the aliphatic epoxy resin was purchased from ERL-4221 of Hubei Jusheng Technology Co., Ltd.; the biphenyl epoxy resin was purchased from Mitsubishi YX4000HK of Shanghai Zhongsi Industrial Co., Ltd. of Japan.

[0076] The curing agent is methyl tetrahydrophthalic anhydride.

[0077] The accelerator is 2-methylimidazole.

[0078] The toughening...

Embodiment 2

[0086] Embodiment 2 of the present invention provides an epoxy resin composition for transformers. In parts by weight, the preparation raw materials include 100 parts of epoxy resin, 60 parts of curing agent, 0.5 parts of accelerator, 70 parts of inorganic filler, 5 parts of toughening agent agent.

[0087] Described epoxy resin comprises bisphenol A type epoxy resin, aliphatic epoxy resin and biphenyl type epoxy resin; Described bisphenol A type epoxy resin, aliphatic epoxy resin and biphenyl type epoxy resin The mass ratio is 1:0.7:0.8.

[0088] The bisphenol A epoxy tree was purchased from An Debao of Shanghai Huayi Resin Co., Ltd. 328; the aliphatic epoxy resin was purchased from ERL-4221 of Hubei Jusheng Technology Co., Ltd.; the biphenyl epoxy resin was purchased from Mitsubishi YX4000HK of Shanghai Zhongsi Industrial Co., Ltd. of Japan.

[0089] The curing agent is methyl tetrahydrophthalic anhydride.

[0090] The accelerator is 2-methylimidazole.

[0091] The toug...

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Abstract

The invention relates to the field of polymer chemical engineering, and particularly provides an epoxy resin composition for a transformer as well as a preparation method and application of the epoxyresin composition. The invention, in the first aspect, provides an epoxy resin composition for a transformer, which is prepared from the following raw materials in parts by weight: 80-100 parts of epoxy resin, 50-60 parts of a curing agent, 0.05-0.5 part of an accelerant, 30-70 parts of inorganic filler and 3-5 parts of a toughening agent.

Description

technical field [0001] The invention relates to the field of polymer chemical industry, and more specifically, the invention provides an epoxy resin composition for transformers and a preparation method thereof. Background technique [0002] Epoxy resin casting type dry-type transformers use epoxy resin as the main insulation. It has a simple structure, small size, high mechanical strength, strong short-circuit resistance, excellent moisture-proof and corrosion resistance, and small partial discharge and long operating life. , low loss, strong overload capacity, the company has rich experience in design and manufacturing, the products have high safety reliability and good environmental protection characteristics, especially the operation performance is very good. Although epoxy resin cast dry-type transformers have many advantages, with the development of society, people's requirements for transformers are also increasing. While super-large-capacity transformers continue to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/00C08L9/02C08K13/04C08K7/26C08K5/5435C08K5/5419
CPCC08K2201/006C08K2201/014C08L63/00C08L2201/08C08L2203/20C08L2205/025C08L2205/035C08L2205/06C08L9/02C08K13/04C08K7/26C08K5/5435C08K5/5419
Inventor 何俊凌
Owner SHANGHAI XIONGRUN RESIN
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